snake oil 2, huge list.

[jtgh]

Gas Saving and Emission Reduction Devices Evaluation | Cars and Light Trucks | US EPA

most, are worthless, others?, never pay you back ,or a Return on investiment (ROI) of 0 or negative.
the interesting thing ,is how they never give up and the tactics used , in the lies and deceptions.
my favorite, the oil companiens tried to buy me out, but I'm Holding fast........ LOL !!!

and they change thier names and products or both, faster than us poor taxed citizens, can afford.

[XL7Limited]

and people keep right on buying all this junk too..

[Rhinoman]

The list covers all devices tested, including those that were proven to work. For example, tt was concluded that the Kamei spoiler would work but would take a long time to pay for itself - but that was at $1.40 a gallon. If you were paying around $8 a gallon like we are in the UK then it would make more sense (or you could buy a modern car, lol). The Morse drive is an interesting one too but much more complex than an underdrive pulley.

[Tracker Tommy]

My head hurts from reading all that